JVN#23568423: Cybozu KUNAI for Android vulnerable to arbitrary Java method execution

Overview

Cybozu KUNAI for Android contains an arbitrary Java method execution vulnerability.

Products Affected

Cybozu KUNAI for Android version 2.0.5 and earlier

Description

Cybozu KUNAI is a mobile client software for using Cybozu. Cybozu KUNAI for Android contains an arbitrary Java method execution vulnerability.

Impact

When opening a specially crafted website, an attacker may be able to execute an arbitrary Java method. As a result, information stored in Android devices may be obtained and arbitrary OS commands may be executed.

Solution

Update the software
Update to the latest version according to the information provided by the developer.

Vendor Status

Vendor	Link
Cybozu	About the problem with Cybozu KUNAI for Android (Ver. 2.0.5 and earlier) (Japanese only)

References

JPCERT/CC Addendum

Vulnerability Analysis by JPCERT/CC

Analyzed on 2012.09.07

Measures	Conditions	Severity
Access Required	can be attacked over the Internet using packets	High
Authentication	anonymous or no authentication (IP addresses do not count)	High
User Interaction Required	the user must be convinced to take a standard action that does not feel harmful to most users, such as click on a link or view a file	Mid
Exploit Complexity	some expertise and/or luck required (most buffer overflows, guessing correctly in small space, expertise in Windows function calls)	Mid-High

Description of each analysis measures

Credit

Other Information

JPCERT Alert
JPCERT Reports
CERT Advisory
CPNI Advisory
TRnotes
CVE	CVE-2012-4011
JVN iPedia	JVNDB-2012-000083

JVN#23568423 Cybozu KUNAI for Android vulnerable to arbitrary Java method execution